Santo Tomé in Fall
In fall (March, April and May), Santo Tomé sees average daytime highs around 26°C and overnight lows near 17°C, with 417 mm of rain over about 29 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 31°C in early March to 21°C by late May. The sky is clear or mostly clear about 42% of the time across fall, and the air most often feels muggy.
Fall is Santo Tomé's 2nd-best season to visit on our travel score. For the whole year in context, see Santo Tomé's year-round climate.
- Avg daytime high
- 26°C
- 3rd-warmest season
- Avg overnight low
- 17°C
- Rainfall
- 417 mm
- 29 wet days
- Avg wind
- 11 km/h
- Travel score
- 6.3
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Santo Tomé in Fall
Over the season highs ease from about 31°C in early March to 21°C by late May.
A typical fall day in Santo Tomé reaches about 26°C and drops to 17°C overnight. The warmest of the three months is March, the coolest May.
How fall really feels in Santo Tomé
Once humidity and wind are folded in, fall brings about 10 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Santo Tomé weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 22° | 160 | 12 | 13.6 | 3.9 |
| Feb | 31° / 21° | 133 | 11.5 | 13 | 4.3 |
| Mar | 30° / 20° | 127 | 10.1 | 12.2 | 5.2 |
| Apr | 27° / 17° | 168 | 10.1 | 11.3 | 6.7 |
| May | 23° / 14° | 121 | 8.4 | 10.6 | 7.1 |
| Jun | 21° / 12° | 115 | 9.4 | 10.2 | 6.5 |
| Jul | 20° / 11° | 117 | 9 | 10.4 | 6.7 |
| Aug | 23° / 12° | 100 | 8.5 | 11 | 7.2 |
| Sep | 24° / 14° | 154 | 10.4 | 11.8 | 7.0 |
| Oct | 27° / 16° | 217 | 12.2 | 12.7 | 6.3 |
| Nov | 29° / 18° | 160 | 9.4 | 13.4 | 5.7 |
| Dec | 31° / 20° | 161 | 10.8 | 13.8 | 4.4 |
Cloud cover in Fall
The sky is clear or mostly clear about 42% of the time across fall.
Chance of precipitation in Fall
Santo Tomé gets around 417 mm of rain over 29 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 11 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 36 min in early March to 10 h 18 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.1 kWh/m².
Is fall a good time to visit Santo Tomé?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Santo Tomé for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Santo Tomé in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Santo Tomé sees daytime highs around 26°C and nights near 17°C. Pack light clothes. Worth having: rain gear and sun protection. About 29 days see rain.
UV index in Santo Tomé in Fall
Clear-sky midday UV across fall averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Santo Tomé peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 13 | 11 | 8 | 5 | 4 | 4 | 5 | 8 | 6 | 11 | 12 |
| Level | Extreme | Extreme | Extreme | Very high | Moderate | Moderate | Moderate | Moderate | Very high | High | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 11 | Extreme |
| Apr | 8 | Very high |
| May | 5 | Moderate |
| Jun | 4 | Moderate |
| Jul | 4 | Moderate |
| Aug | 5 | Moderate |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in Santo Tomé in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Santo Tomé is worst in September — around 16 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (March, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 14 | 6 | 7 | 6 | 7 | 10 | 15 | 16 | 9 | 9 | 6 |
| Level | Good | Moderate | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 14 | Moderate |
| Mar | 6 | Good |
| Apr | 7 | Good |
| May | 6 | Good |
| Jun | 7 | Good |
| Jul | 10 | Good |
| Aug | 15 | Moderate |
| Sep | 16 | Moderate |
| Oct | 9 | Good |
| Nov | 9 | Good |
| Dec | 6 | Good |
Where is Santo Tomé?
Santo Tomé sits at 28.6°S, 56.0°W, 67 m above sea level, in Argentina. The nearest listed city is São Borja, 13 km away.
Topography around Santo Tomé
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santo Tomé.
Within 3 km, the terrain around Santo Tomé has only modest variations in elevation — a maximum elevation change of 47 m around an average of 67 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 78 m; within 80 km, only modest variations in elevation — a maximum elevation change of 203 m.
The land around Santo Tomé is covered by trees (28%) and grassland (27%) within 3 km, grassland (28%), trees (26%) and cropland (20%) within 16 km, and grassland (39%), cropland (22%) and wetland (21%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Santo Tomé (-28.551°, -56.0412°, elevation 67 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.